remcos | 98bcb2a98c5347e4409349f1605a7883a40a541cffc4aa62bf7c77b5160cdd20

Analysis

max time kernel
147s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-10-2024 01:40

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General

Target

98bcb2a98c5347e4409349f1605a7883a40a541cffc4aa62bf7c77b5160cdd20.rtf
Size

97KB
MD5

904af9fb7e5bee74577f430af1080585
SHA1

71b79e6f053b89985d109d81670f2dce172775ae
SHA256

98bcb2a98c5347e4409349f1605a7883a40a541cffc4aa62bf7c77b5160cdd20
SHA512

bea7087cc00f169433e00f1ca03b07b37eb0a9299ad406e551d840021c47ae29aea0ef5c25cd168bc74812de6395f6c83f40f356e8108d78cbb238bf33455316
SSDEEP

768:czOjyekZVi0QtGJPKrEvK64F5nMn10Me3Ffp8w:HvoetGJid6K5nmW3Fp8w

Score

10^/10

remcos newest collection discovery rat

Malware Config

Extracted

Family

remcos

Botnet

newest

107.173.4.16:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-FI789R
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/memory/2552-64-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1232-68-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1884-69-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2552-64-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1232-68-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	2868	EQNEDT32.EXE

Downloads MZ/PE file

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\name.vbs	name.exe

Executes dropped EXE 2 IoCs

pid	Process
2336	taskhostw.exe
1524	name.exe

Loads dropped DLL 2 IoCs

pid	Process
2868	EQNEDT32.EXE
2336	taskhostw.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0007000000015e4f-9.dat	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1524 set thread context of 1108	1524	name.exe	35
PID 1108 set thread context of 1232	1108	svchost.exe	37
PID 1108 set thread context of 2552	1108	svchost.exe	38
PID 1108 set thread context of 1884	1108	svchost.exe	39

System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskhostw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	name.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2868	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2468	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1232	svchost.exe
1232	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1524	name.exe
1108	svchost.exe
1108	svchost.exe
1108	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1884	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2336	taskhostw.exe
2336	taskhostw.exe
1524	name.exe
1524	name.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2336	taskhostw.exe
2336	taskhostw.exe
1524	name.exe
1524	name.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2468	WINWORD.EXE
2468	WINWORD.EXE
2468	WINWORD.EXE

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2868 wrote to memory of 2336	2868	EQNEDT32.EXE	33
PID 2868 wrote to memory of 2336	2868	EQNEDT32.EXE	33
PID 2868 wrote to memory of 2336	2868	EQNEDT32.EXE	33
PID 2868 wrote to memory of 2336	2868	EQNEDT32.EXE	33
PID 2336 wrote to memory of 1524	2336	taskhostw.exe	34
PID 2336 wrote to memory of 1524	2336	taskhostw.exe	34
PID 2336 wrote to memory of 1524	2336	taskhostw.exe	34
PID 2336 wrote to memory of 1524	2336	taskhostw.exe	34
PID 1524 wrote to memory of 1108	1524	name.exe	35
PID 1524 wrote to memory of 1108	1524	name.exe	35
PID 1524 wrote to memory of 1108	1524	name.exe	35
PID 1524 wrote to memory of 1108	1524	name.exe	35
PID 1524 wrote to memory of 1108	1524	name.exe	35
PID 1108 wrote to memory of 1232	1108	svchost.exe	37
PID 1108 wrote to memory of 1232	1108	svchost.exe	37
PID 1108 wrote to memory of 1232	1108	svchost.exe	37
PID 1108 wrote to memory of 1232	1108	svchost.exe	37
PID 1108 wrote to memory of 1232	1108	svchost.exe	37
PID 1108 wrote to memory of 2552	1108	svchost.exe	38
PID 1108 wrote to memory of 2552	1108	svchost.exe	38
PID 1108 wrote to memory of 2552	1108	svchost.exe	38
PID 1108 wrote to memory of 2552	1108	svchost.exe	38
PID 1108 wrote to memory of 2552	1108	svchost.exe	38
PID 1108 wrote to memory of 1884	1108	svchost.exe	39
PID 1108 wrote to memory of 1884	1108	svchost.exe	39
PID 1108 wrote to memory of 1884	1108	svchost.exe	39
PID 1108 wrote to memory of 1884	1108	svchost.exe	39
PID 1108 wrote to memory of 1884	1108	svchost.exe	39

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\98bcb2a98c5347e4409349f1605a7883a40a541cffc4aa62bf7c77b5160cdd20.rtf"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2468

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\AppData\Roaming\taskhostw.exe
  "C:\Users\Admin\AppData\Roaming\taskhostw.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Users\Admin\AppData\Local\directory\name.exe
    "C:\Users\Admin\AppData\Roaming\taskhostw.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:1524
  - - C:\Windows\SysWOW64\svchost.exe
      "C:\Users\Admin\AppData\Roaming\taskhostw.exe"
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:1108
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\yqqafkhibogiecvjqotjhcw"
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        
        PID:1232
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\jswlgdsbxwyngjjnzzflkhiwwx"
        5⤵
        Accesses Microsoft Outlook accounts
        System Location Discovery: System Language Discovery
        
        PID:2552
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\lnbdhvldleqrqxfrqjamvtdnxlntzu"
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:1884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Exploitation for Client Execution

T1203

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\yqqafkhibogiecvjqotjhcw

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\taskhostw.exe

Filesize
1.2MB

MD5
6539c2c942c9aa3ab9c7fe14fccf0b4e

SHA1
f4a663d69419e1cdef4d31ae003c89f6c19f23c0

SHA256
d98fa625a92c790403ee5f8be928948855ea23a892321cc7d219895d3f5b1c36

SHA512
9a2141a4f2aadd4613f665ccff25e1be5ec4b31716f2f56982220032e688a860e28c0783626df885eca8f120c0c7c088b1e28438faa6f0a1c3125ba760f8bb09

Download Submit
memory/1108-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1108-75-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1108-79-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1108-78-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1232-59-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1232-58-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1232-63-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1232-68-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1884-66-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1884-67-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1884-69-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2468-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2468-4-0x0000000070BAD000-0x0000000070BB8000-memory.dmp

Filesize
44KB

Download
memory/2468-2-0x0000000070BAD000-0x0000000070BB8000-memory.dmp

Filesize
44KB

Download
memory/2468-0-0x000000002FAE1000-0x000000002FAE2000-memory.dmp

Filesize
4KB

Download
memory/2552-62-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2552-61-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2552-64-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2552-60-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download